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| author | Tiezhu Yang <yangtiezhu@loongson.cn> | 2020-11-03 08:12:00 +0100 |
|---|---|---|
| committer | Thomas Bogendoerfer <tsbogend@alpha.franken.de> | 2020-11-11 23:51:47 +0100 |
| commit | 4d1b3ac886b5c03e966199edcc7e0efddd5c4cb2 (patch) | |
| tree | 12ba3916ea81faf781f8cdfd925f4ea20d878b98 /arch/mips | |
| parent | MIPS: remove GCC < 4.9 support (diff) | |
| download | linux-4d1b3ac886b5c03e966199edcc7e0efddd5c4cb2.tar.xz linux-4d1b3ac886b5c03e966199edcc7e0efddd5c4cb2.zip | |
MIPS: Loongson64: Do not write the read only field LPA of CP0_CONFIG3
The field LPA of CP0_CONFIG3 register is read only for Loongson64, so the
write operations are meaningless, remove them.
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/include/asm/mach-loongson64/kernel-entry-init.h | 8 | ||||
| -rw-r--r-- | arch/mips/loongson64/numa.c | 3 |
2 files changed, 0 insertions, 11 deletions
diff --git a/arch/mips/include/asm/mach-loongson64/kernel-entry-init.h b/arch/mips/include/asm/mach-loongson64/kernel-entry-init.h index 87a5bfbf8cfe..e4d77f4f0fe3 100644 --- a/arch/mips/include/asm/mach-loongson64/kernel-entry-init.h +++ b/arch/mips/include/asm/mach-loongson64/kernel-entry-init.h @@ -19,10 +19,6 @@ .macro kernel_entry_setup .set push .set mips64 - /* Set LPA on LOONGSON3 config3 */ - mfc0 t0, CP0_CONFIG3 - or t0, (0x1 << 7) - mtc0 t0, CP0_CONFIG3 /* Set ELPA on LOONGSON3 pagegrain */ mfc0 t0, CP0_PAGEGRAIN or t0, (0x1 << 29) @@ -54,10 +50,6 @@ .macro smp_slave_setup .set push .set mips64 - /* Set LPA on LOONGSON3 config3 */ - mfc0 t0, CP0_CONFIG3 - or t0, (0x1 << 7) - mtc0 t0, CP0_CONFIG3 /* Set ELPA on LOONGSON3 pagegrain */ mfc0 t0, CP0_PAGEGRAIN or t0, (0x1 << 29) diff --git a/arch/mips/loongson64/numa.c b/arch/mips/loongson64/numa.c index cf9459f79f9b..c7e3ccedc74f 100644 --- a/arch/mips/loongson64/numa.c +++ b/arch/mips/loongson64/numa.c @@ -40,9 +40,6 @@ static void enable_lpa(void) unsigned long value; value = __read_32bit_c0_register($16, 3); - value |= 0x00000080; - __write_32bit_c0_register($16, 3, value); - value = __read_32bit_c0_register($16, 3); pr_info("CP0_Config3: CP0 16.3 (0x%lx)\n", value); value = __read_32bit_c0_register($5, 1); |